The only thing that is really clear about it is the fact that said book scarred me for life.
Painted Bird was eye-opening. Heavily influenced by Voltaire's "Candide", which, by the way, is probably the most accessible and enjoyable "serious" philosophical novel in existence. I anticipate angry posts referring to Herman Hesse and Ayn Rand, but I don't care.
Apart from Catcher in the Rye being the prototypical adolescent angst book, I've always been confused as to its presence at the top of best-of lists. Franny & Zooey, I've always found it
over-appreciated. Narcissistic prodigies who drive themselves half-mad questing for spiritual development? I want something I can relate to, like God allegories involving orphans and zoo-animals.

.
My read-before-you-die list includes these, in random order:
-- Ann Patchett - Bel Canto
Despite the opera theme (the author was apparently inspired by Renee Fleming's performance in Rusalka), the idea of a voice so beautiful it changes lives will probably appeal to some forum-goers;
-- Philip Roth - Portnoy's Complaint
It's angsty like Catcher in the Rye, but Jewish, and less pretentious. Might put you off liver though.
-- Vladimir Nabakov - Lolita
Even if you despise Humbert Humbert, perhaps almost as much as he despises himself, he is a cultural icon that noone talks about. Kind of interesting.
-- Vladimir Nabakov - Pale Fire
You're unlikely to ever read this book. If you do, it will probably change your life. The first part of the book is a poem written by a fictitious poet named John Shade; the second is a (supposed) commentary written by his neighbour, fan, and unauthorized biographer Charles Kinbote. Kinbote perverts the commentary into a personal vindication, and a history of a fantastic kingdom that he claims to be the exiled king of, Zembla.
-- Oscar Wilde - The Picture of Dorian Gray
The best thing a genius ever wrote. Keep in mind, this was the guy who said to his friend Andree Gide as he lay dying, "I have put my genius into my life; all I've put into my works is my talent."
-- Italo Calvino -- If on a winter's night a traveler
Ten incomplete stories by ten fictitious authors interlaced with a completed narrative, narrarated by you, The Reader. You uncover a plot against the world of literature, and fall in love. Wish fulfillment? Why I never . . . .
-- Emily Bronte -- Wuthering Heights
Heathcliff is creepy. Really, really, really creepy.
. . . . and onward. Sorry for the long post. I'm enthusiastic about books.
--Moiche